Crank won't turn

[Wounded_Fighter]

Fired the parts cannon

Parts cannon fired back.

 

New crank, bearings, etc. Tq to spec 80ftlb, in tq order. Harmonic balancer bolt over-torques before crank will spin. ( no pistons or anything else on yet )

 

Plastiguage set at 0.003 all the way down the crank. 

 

Stumped.

Thoughts? 

Help...?

[Spinnakerblue89]

Just food for thought, are you certain it isn't an electrical or sensorial problem? What exactly happens when you try to start the truck, walk us through the things you see and hear, please.

[Wounded_Fighter]

Fairly certain it's not electrical 😉

[Eagle_SX4]

I don't have much experience with engine building. However it would help to find out which bearing(s) is causing the issue. Loosen all the caps and then torque one cap at a time and check rotation and figure out if it is just one bearing causing the issue or all of them.

[AZJeff]

20 hours ago, Eagle_SX4 said:

I don't have much experience with engine building. However it would help to find out which bearing(s) is causing the issue. Loosen all the caps and then torque one cap at a time and check rotation and figure out if it is just one bearing causing the issue or all of them.

EXCELLENT SUGGESTION.

 

BTW, I assume the OP has slathered all the crank journals with assembly lube or, at the least, motor oil.

[TurboedMJ]

https://www.enginelabs.com/engine-tech/engine/explaining-under-and-oversized-engine-bearings-with-king-bearings/

Make sure your bearings are all the right size.